Machines for screening and concentrating ores



my 31,, 1955 R. P; FISHER MACHINES FOR SCREENING AND CONCENTRATING ORES Filed May 28, 1953 f m a P F m 2. 2

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lt'lACHiNES FOR SCREENING AND CONCENTRATING ORES Robert P. Fisher, Les Angeles, Calif.

Application May 28, 1953, denial No. 357,971

3 Claims. (Cl. 209-346) This invention relates to machines for screening and concentrating ores, and the like, and it has among its salient objects:

To provide a portable machine of the character referred to in which a table, with one or more screens sup ported thereon, one above the other, is operativcly supported at its opposite ends upon power operated eccentrics, whereby said table and screens can be vertically vibrated in a screening and concentrating operation;

To provide in such a machine, eccentrics which can both be adjusted circumferentially, whereby to provide ditTerent throws, or degrees of vibration, and in which said eccentrics can be adjusted to operate uniformly, or to operate each with a different throw, or degree of vibration, as may be required for best results;

To provide in combination with two spaced operating eccentrics and means for supporting a table and its screens thereon, two coiled springs upon which said mechanism is supported, and which are responsive to the movements of said eccentrics;

To provide a unique supporting mechanism for a concentrating table, or table and screens, which is actuated by said eccentrics, and which provides for a certain longitudinal movement in the connecting and supporting means for said tabie to compensate for the difference in throw of said eccentrics when one is adjusted for a greater throw than the other;

To provide not only for different throws in the eccentrics, but also to provide for different adjustments of the supports connected therewith for supporting the table and screens, whereby difierent degrees of incline may be had for said table and screens.

Other objects and advantages will appear from the following more detailed description of one embodiment of the invention, taken with the accompanying sheet of drawings, which i will now describe.

Referring in detail to the drawings:

Figure 1 is a side elevation of a machine embodying my invention;

Figure 2 is a plan view thereof, and

Figures 3 and 4 are views of details.

in the drawing, I have shown a base or support for the machine which includes two spaced channel irons, as 5, 5, with two connecting channel members, as 6, 6, thus forming a suitable, portable supporting frame or base for the machine.

Upon this supporting frame are shown two pairs of spaced bearing blocks, as 7, 7, and b, 8. A shaft 9 has its opposite ends supported in bearing blocks 7, 7, and a shaft it) has its opposite ends supported in bearing blocks 8, 8. Said shafts 9 and it are provided on their corresponding ends with two drive pulleys, as 9 and 10', to be connected by a belt 11, whereby one shaft can be driven from the other. On the opposite end of one of said shafts, being shaft 19 in the present showing, is another pulley 12, to be driven from a motor, or other source of power, as by a belt 13.

Shaft 9 has an eccentric portion 9" formed thereon.

States Patent ice Mounted on said eccentric portion is an eccentric sleeve 14, as indicated in Fig. 3. This sleeve can be turned to increase the throw of the eccentric. Said sleeve is provided in its end with a series of teeth or notches, as 14'. A movable short sleeve, as 15', with corresponding notches, as 15, is mounted on the eccentric portion 9 of the shaft 9 to be moved into and out of engagement with the notches 14 in the sleeve 14 to hold said eccentric sleeve in different positions of adjustment around said portion 9". Said short sleeve 15 is provided in its inner surface with a key-way to slide on a stud, as at 15", whereby said short sleeve can be moved back and the sleeve 14 turned to the desired position, and said short sleeve moved back into mesh with the end of said sleeve, as will be clear from the showing. A set screw can also be used on said short sleeve to lock it tight after the desired adjustment has been made.

A carrier sleeve, as 16, is mounted on said eccentric sleeve 14, and said carrier sleeve has thereon an upstanding web or plate, as 17.

The shaft 10 also has an eccentric portion, as 10", on which is mounted an eccentric sleeve 18, having the end notches or teeth 18', similar to the sleeve 14 and the teeth 14. There is also the short lock sleeve 18, which is the same as the short sleeve 15, and as illustrated in Fig. 3, as one method of holding the eccentric sleeves 14 and 18 in adjusted positions to determine the throw of the eccentric. Mounted on said eccentric sleeve 13 is also a carrier sleeve 19, on which is an upstanding web or plate 20, similar to the web 17.

Secured to the upstandmg plate 17', as by bolts 17', is a cross plate or bar 21, and secured to the upstanding plate 20, by bolts 20, is a cross plate or bar 22.

In the opposite ends of each of these cross bars 21 and 22, transversely thereof, are two short shafts or members, as 21', 21, held in place by nuts, as 21'', 21".

In the opposite ends of cross member 22 are secured two short shafts, as 22, 22, held in place by nuts 22", 22", as shown.

Two parallel tubular connecting members, as 23 and 24, are shown connected at their ends with the short members 21, 21, by means of rivets, as 23 and 24'. The other ends of said tubular members 23 and 24 are telescoped over the two members 22, 22, so as to have a sliding movement thereon, as will be understood from Figs. 1 and 2, to compensate for the vertical vibrations.

Said tubes 23 and 24 are connected also intermediate their ends by two cross members 25, 25, shown to be inverted channel members. The connecting members for the base members 5, 5, are also upright channel members, 6, 6, as shown in Pig. 1.

Two coiled springs, as 26 and 27, are shown seated between said upper members 25, 25, and said lower mem bers 6, 6, on short bosses, as illustrated at 6", Fig. 1.

Mounted on said tubes 23 and 24, toward the cross member 22, at the right end of Figs. 1 and 2, are two bushings, as 28 and 2?, secured by set screws 28' and 29', with a cross connecting member 30, held tight at its opposite ends by nuts 31, 31, on said bushings 23 and 29, as shown.

Mounted on the cross member 21, at the left end of the machine, are two spaced hinge-like members, as 32, 32, shown in perspective view in Fig. 4. One part, 32, of each hinge member, is slotted so as to be adjusted vertically by means of bolt and nut, 33, as indicated, while the other part of said hinge members, 3'2", are secured to the under side of a supporting or concentrating table 34, as seen in Fig. 1.

Mounted on cross member 30, connecting the bushings 28 and 29, are two spaced vertical hinge-like members, as 36, 36, similar to the members 32, for supporting the other end of the table 34, as seen in Fig. 1.

I have shown two screens, as 37 and 33, supported one above the other, as in a pan .39, and have also shown two cushioning members, as 49, 44 between the opposite ends of the table 34 and the pan 39.

Thus by means of the adjustable hinge-like members, 32 and 36, under the opposite ends of the table 34, said table can be adjusted to any desired tilt or angle.

Inasmuch as said supporting members are supported by the cross members 21 and 22, and these cross members are supported by the upstanding webs or plates 17 and 20, on the sleeves to and 19, which are on the eccentric sleeves 14 and 18, it will be understood that the opposite ends of said table and screens can be given any degree of vertical vibration; that the throw of the op posite ends can be different, or the same, and that almost any adjustment of inclination of the table and the screens, and the vertical vibration can be secured, ail as may be desired for the different uses to which the machine may be put.

I am aware that changes in the details of construction and arrangement as shown can be made Within the scope of the invention, and I do not, therefore, limit the invention to the showing as here illustrated, except as i may be limited by the hereto appended claims.

I claim:

1. In a machine of the character referred to: a supporting base, a pair of bearing blocks at each end of said base, two shafts across the opposite ends of said base, each having its opposite ends in the opposite bearing blocks at its end of said base, driving means on said shafts for driving them, each shaft having thereon, be tween its opposite ends, a variable eccentric supporting mechanism for transmitting vibration as said eccentric mechanisms are driven, spaced parallel tubular members connected at their opposite ends with said eccentric mechanisms to receive vibrations therefrom, said parallel tubular members having telescoping connections at one end of said base with relation to said eccentric supporting mechanism at that end of said base, whereby to compensate for the different degrees of throw in said eccentric supporting mechanism, and an ore treating table supported above and on said parallel tubular members to receive vibrations therefrom.

2. A machine of the character set forth in claim 1 in which the supports for the ore treating table are adjust able to make possible diflierent degrees of inclination for said table.

3. A machine of the character set forth in claim 1 which includes coiled springs between said base and said parallel tubular members.

References Cited in the file of this patent UNITED STATES PATENTS 1,590,339 Wood t June 29, 1926 2,663,423 Wheeler Dec. 22, 1953 FOREIGN PATENTS 295,359 Great Britain Dec. 27, 1928 

1. IN A MACHINE OF THE CHARACTER REFERRED TO: A SUPPORTING BASE, A PAIR OF BEARING BLOCKS AT EACH END OF SAID BASE, TWO SHAFTS ACROSS THE OPPOSITE ENDS OF SAID BASE, EACH HAVING ITS OPPOSITE ENDS IN THE OPPOSITE BEARING BLOCKS AT ITS END OF SAID BASE, DRIVING MEANS ON SAID SHAFTS FOR DRIVING THEM, EACH SHAFT HAVING THEREON, BETWEEN ITS OPPOSITE ENDS, A VARIABLE ECCENTRIC SUPPORTING MECHANISM FOR TRANSMITTING VIBRATION AS SAID ECCENTRIC MECHANISMS ARE DRIVEN, SPACED PARALLEL TUBULAR MEMBERS CONNECTED AT THEIR OPPOSITE ENDS WITH SAID ECCENTRIC MECHANISMS TO RECEIVE VIBRATIONS THEREFROM, SAID PARALLEL TUBULAR MEMBERS HAVING TELESCOPING CONNECTIONS AT ONE END OF SAID BASE WITH RELATION TO SAID ECCENTRIC SUPPORTING MECHANISM AT THAT END OF SAID BASE, WHEREBY TO COMPENSATE FOR THE DIFFERENT DEGREES OF THROW IN SAID ECCENTIC SUPPORTING MECHANISM, AND AN ORE TREATING TABLE SUPPORTED ABOVE AND ON SAID PARALLEL TUBULAR MEMBERS TO RECEIVE VIBRATIONS THEREFROM. 